物理化学学报 >> 2003, Vol. 19 >> Issue (09): 867-870.doi: 10.3866/PKU.WHXB20030918

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萘由水到水-叔丁醇混合溶剂的迁移热力学函数

周保学;蔡伟民;邹立壮   

  1. 上海交通大学环境科学与工程学院, 上海　200240; 哈尔滨工业大学, 哈尔滨　150001; 中国矿业大学(北京)化学与环境工程学院, 北京　100083
  • 收稿日期:2003-01-27 修回日期:2003-04-07 发布日期:2003-09-15
  • 通讯作者: 蔡伟民 E-mail:wmcai@mail.sjtu.edu.cn

Thermodynamic Functions of Transfer of Naphthalene from Water to Water-t-butyl Alcohol Solutions

Zhou Bao-Xue;Cai Wei-Min;Zou Li-Zhuang   

  1. School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai　200240; Harbin Institute of Technology, Harbin　150001; School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing　100083
  • Received:2003-01-27 Revised:2003-04-07 Published:2003-09-15
  • Contact: Cai Wei-Min E-mail:wmcai@mail.sjtu.edu.cn

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摘要： 通过溶解度法研究了萘从水到水-叔丁醇(TBA)混合溶剂中的标准迁移热力学性质.结果表明, 标准迁移自由能随叔丁醇摩尔分数x(TBA)的增加表现出复杂的下降趋势.标准迁移熵和标准迁移焓呈现双峰变化.迁移熵和迁移焓的双峰变化, 表明系列H2O-TBA混合溶剂的微观结构经历了从相对的有序到无序到再有序、再无序、再有序的变化过程；H2O-TBA混合溶剂中除了在富水区存在着笼合物特殊结构外, 在x(TBA) 约为0.08处还存在着一相对有序的结构.

关键词: 萘, 叔丁醇, 迁移热力学函数, 分子间相互作用

Abstract: Standard thermodynamic functions of transfer of naphthalene from water to H2O-t-butyl alcohol (TBA) mixtures were determined from the solubility measurements at different temperatures. Standard free energies of transfer for naphthalene showed a complex decreasing tendency with the increasing of x(TBA), and the standard entropy and enthalpy of transfer exhibited a variation of double peak curves with x(TBA).This illustrated that the micro structures of series mixed solvents of H2O-TBA underwent a complicated process from relative order to relative disorder and then from relative disorder to relative order, and back to relative disorder again, then up to relative order. The results suggested that there was a relatively ordered structure near x(TBA)= 0.08 in H2O-TBA solutions besides the existence of a clathrate structure in the water-rich region.

Key words: Naphthalene, t-butyl alcohol, Thermodynamic functions of transfer, 　Intermolecular interactions